Clinical Research Directory
Browse clinical research sites, groups, and studies.
Acute Effects of Focal Vibration on Posterior Shoulder Tightness and Tissue Stiffness in Overhead Athletes
Sponsor: Saglik Bilimleri Universitesi
Summary
This study aims to investigate the acute effects of focal vibration on posterior shoulder tightness, posterior shoulder muscle stiffness, and glenohumeral range of motion in overhead athletes. A total of 36 overhead athletes aged 18-25 years who have regularly participated in overhead sports for at least four years will be included. Participants will be randomly allocated to either the focal vibration group or the sham control group using block randomization. All outcome assessments will be performed immediately before and immediately after a single intervention session. The primary outcome measure is posterior shoulder tightness, assessed using the Horizontal Adduction Test. Secondary outcome measures include posterior shoulder muscle stiffness, assessed using the IndentoPRO digital tissue indentometer, and passive glenohumeral internal and external rotation range of motion, measured using the GYKO inertial sensor. The primary research question is whether focal vibration has an acute effect on posterior shoulder tightness, muscle stiffness, and glenohumeral range of motion in overhead athletes. It is hypothesized that participants receiving focal vibration will demonstrate greater reductions in posterior shoulder tightness and muscle stiffness, as well as greater improvements in glenohumeral range of motion, compared with those receiving the sham intervention.
Official title: Acute Effects of Focal Vibration on Posterior Shoulder Tightness and Tissue Stiffness in Overhead Athletes: A Single-Blind Randomized Controlled Trial
Key Details
Gender
All
Age Range
18 Years - 25 Years
Study Type
INTERVENTIONAL
Enrollment
36
Start Date
2026-02-05
Completion Date
2026-09-15
Last Updated
2026-08-11
Healthy Volunteers
No
Conditions
Interventions
Focal Vibration
A standardized single-session focal vibration intervention applied to the posterior shoulder muscles using fixed vibration parameters. The protocol is designed to evaluate the immediate effects of focal vibration on posterior shoulder tightness and related shoulder functions in overhead athletes and includes a sham-controlled comparison to distinguish treatment effects from placebo.
Sham Focal Vibration
The sham focal vibration intervention is performed using the same device, application duration, and application site as the active intervention. However, the device is configured not to deliver therapeutic vibration. This approach is intended to maintain participant blinding and to determine whether the observed effects are attributable to focal vibration rather than placebo effects.
Locations (1)
Faculty of Physiotherapy and Rehabilitation, University of Health Sciences Ankara
Ankara, Turkey (Türkiye)